[INFO] fetching crate flatten 0.2.2...
[INFO] checking flatten-0.2.2 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate flatten 0.2.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate flatten 0.2.2 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate flatten 0.2.2
[INFO] finished tweaking crates.io crate flatten 0.2.2
[INFO] tweaked toml for crates.io crate flatten 0.2.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 125d7554ee010c2d29961b66f93161eb15ac755db5bde28dd5c4ea7eeb16c2ee
[INFO] running `Command { std: "docker" "start" "-a" "125d7554ee010c2d29961b66f93161eb15ac755db5bde28dd5c4ea7eeb16c2ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "125d7554ee010c2d29961b66f93161eb15ac755db5bde28dd5c4ea7eeb16c2ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "125d7554ee010c2d29961b66f93161eb15ac755db5bde28dd5c4ea7eeb16c2ee", kill_on_drop: false }`
[INFO] [stdout] 125d7554ee010c2d29961b66f93161eb15ac755db5bde28dd5c4ea7eeb16c2ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c58b4944ae0fc2c3ffe9dc71ff2670a7c355ed3353070281cfb5d39b219fbbd
[INFO] running `Command { std: "docker" "start" "-a" "7c58b4944ae0fc2c3ffe9dc71ff2670a7c355ed3353070281cfb5d39b219fbbd", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking flatten v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> src/cons/mod.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub auto trait ValidHead {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]    = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> src/cons/mod.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub auto trait ValidHead {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]    = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]   --> src/cons/mod.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl !ValidHead for Nil {}
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]   --> src/cons/mod.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl !ValidHead for Nil {}
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]   --> src/cons/mod.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl<H, T> !ValidHead for Cons<H, T> {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/into_cons.rs:152:1
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub auto trait NotTuple {}
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:153:6
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl !NotTuple for () {}
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 | impl<A> !NotTuple for (A,) {}
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 | impl<R> !NotTuple for Either<!, R> {}
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 | / impl_for_tuple! {
[INFO] [stdout] 249 | |    (0, A),
[INFO] [stdout] 250 | |    (1, B),
[INFO] [stdout] 251 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 253 | / impl_for_tuple! {
[INFO] [stdout] 254 | |    (0, A),
[INFO] [stdout] 255 | |    (1, B),
[INFO] [stdout] 256 | |    (2, C),
[INFO] [stdout] 257 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 259 | / impl_for_tuple! {
[INFO] [stdout] 260 | |    (0, A),
[INFO] [stdout] 261 | |    (1, B),
[INFO] [stdout] 262 | |    (2, C),
[INFO] [stdout] 263 | |    (3, D),
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]   --> src/cons/mod.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl<H, T> !ValidHead for Cons<H, T> {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 266 | / impl_for_tuple! {
[INFO] [stdout] 267 | |    (0, A),
[INFO] [stdout] 268 | |    (1, B),
[INFO] [stdout] 269 | |    (2, C),
[INFO] [stdout] 270 | |    (3, D),
[INFO] [stdout] 271 | |    (4, E),
[INFO] [stdout] 272 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/into_cons.rs:152:1
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub auto trait NotTuple {}
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:153:6
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl !NotTuple for () {}
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 | / impl_for_tuple! {
[INFO] [stdout] 275 | |    (0, A),
[INFO] [stdout] 276 | |    (1, B),
[INFO] [stdout] 277 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 280 | |    (5, F),
[INFO] [stdout] 281 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 | impl<A> !NotTuple for (A,) {}
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 | impl<R> !NotTuple for Either<!, R> {}
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 | / impl_for_tuple! {
[INFO] [stdout] 249 | |    (0, A),
[INFO] [stdout] 250 | |    (1, B),
[INFO] [stdout] 251 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 253 | / impl_for_tuple! {
[INFO] [stdout] 254 | |    (0, A),
[INFO] [stdout] 255 | |    (1, B),
[INFO] [stdout] 256 | |    (2, C),
[INFO] [stdout] 257 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 259 | / impl_for_tuple! {
[INFO] [stdout] 260 | |    (0, A),
[INFO] [stdout] 261 | |    (1, B),
[INFO] [stdout] 262 | |    (2, C),
[INFO] [stdout] 263 | |    (3, D),
[INFO] [stdout] 264 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 266 | / impl_for_tuple! {
[INFO] [stdout] 267 | |    (0, A),
[INFO] [stdout] 268 | |    (1, B),
[INFO] [stdout] 269 | |    (2, C),
[INFO] [stdout] 270 | |    (3, D),
[INFO] [stdout] 271 | |    (4, E),
[INFO] [stdout] 272 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 | / impl_for_tuple! {
[INFO] [stdout] 275 | |    (0, A),
[INFO] [stdout] 276 | |    (1, B),
[INFO] [stdout] 277 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 280 | |    (5, F),
[INFO] [stdout] 281 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 283 | / impl_for_tuple! {
[INFO] [stdout] 284 | |    (0, A),
[INFO] [stdout] 285 | |    (1, B),
[INFO] [stdout] 286 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 290 | |    (6, G),
[INFO] [stdout] 291 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 293 | / impl_for_tuple! {
[INFO] [stdout] 294 | |    (0, A),
[INFO] [stdout] 295 | |    (1, B),
[INFO] [stdout] 296 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 301 | |    (7, H),
[INFO] [stdout] 302 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 304 | / impl_for_tuple! {
[INFO] [stdout] 305 | |    (0, A),
[INFO] [stdout] 306 | |    (1, B),
[INFO] [stdout] 307 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 313 | |    (8, I),
[INFO] [stdout] 314 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 316 | / impl_for_tuple! {
[INFO] [stdout] 317 | |    (0, A),
[INFO] [stdout] 318 | |    (1, B),
[INFO] [stdout] 319 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 326 | |    (9, J),
[INFO] [stdout] 327 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 329 | / impl_for_tuple! {
[INFO] [stdout] 330 | |    (0, A),
[INFO] [stdout] 331 | |    (1, B),
[INFO] [stdout] 332 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 340 | |    (10, K),
[INFO] [stdout] 341 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 343 | / impl_for_tuple! {
[INFO] [stdout] 344 | |    (0, A),
[INFO] [stdout] 345 | |    (1, B),
[INFO] [stdout] 346 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 355 | |    (11, L),
[INFO] [stdout] 356 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: this is an internal attribute that will never be stable
[INFO] [stdout]   --> src/tuple.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / #[rustc_on_unimplemented = "
[INFO] [stdout] 19 | | If you are writing generic code, add a bound like
[INFO] [stdout] 20 | |
[INFO] [stdout] 21 | |     where {OrigType}: Flatten,
[INFO] [stdout] ...  |
[INFO] [stdout] 31 | |
[INFO] [stdout] 32 | | This is required because current type system does not have negative reasoning."]
[INFO] [stdout]    | |________________________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:64
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |                                                                ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/into_cons.rs:234:21
[INFO] [stdout]     |
[INFO] [stdout] 234 |                       ( $( $N ),* )
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 | / impl_for_tuple! {
[INFO] [stdout] 249 | |    (0, A),
[INFO] [stdout] 250 | |    (1, B),
[INFO] [stdout] 251 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 283 | / impl_for_tuple! {
[INFO] [stdout] 284 | |    (0, A),
[INFO] [stdout] 285 | |    (1, B),
[INFO] [stdout] 286 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 290 | |    (6, G),
[INFO] [stdout] 291 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 293 | / impl_for_tuple! {
[INFO] [stdout] 294 | |    (0, A),
[INFO] [stdout] 295 | |    (1, B),
[INFO] [stdout] 296 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 301 | |    (7, H),
[INFO] [stdout] 302 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 304 | / impl_for_tuple! {
[INFO] [stdout] 305 | |    (0, A),
[INFO] [stdout] 306 | |    (1, B),
[INFO] [stdout] 307 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 313 | |    (8, I),
[INFO] [stdout] 314 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 316 | / impl_for_tuple! {
[INFO] [stdout] 317 | |    (0, A),
[INFO] [stdout] 318 | |    (1, B),
[INFO] [stdout] 319 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 326 | |    (9, J),
[INFO] [stdout] 327 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 329 | / impl_for_tuple! {
[INFO] [stdout] 330 | |    (0, A),
[INFO] [stdout] 331 | |    (1, B),
[INFO] [stdout] 332 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 340 | |    (10, K),
[INFO] [stdout] 341 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stdout]    --> src/into_cons.rs:218:36
[INFO] [stdout]     |
[INFO] [stdout] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stdout]     |                                      ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 343 | / impl_for_tuple! {
[INFO] [stdout] 344 | |    (0, A),
[INFO] [stdout] 345 | |    (1, B),
[INFO] [stdout] 346 | |    (2, C),
[INFO] [stdout] ...   |
[INFO] [stdout] 355 | |    (11, L),
[INFO] [stdout] 356 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stdout]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout]     = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: this is an internal attribute that will never be stable
[INFO] [stdout]   --> src/tuple.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / #[rustc_on_unimplemented = "
[INFO] [stdout] 19 | | If you are writing generic code, add a bound like
[INFO] [stdout] 20 | |
[INFO] [stdout] 21 | |     where {OrigType}: Flatten,
[INFO] [stdout] ...  |
[INFO] [stdout] 31 | |
[INFO] [stdout] 32 | | This is required because current type system does not have negative reasoning."]
[INFO] [stdout]    | |________________________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2024-09-17; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:64
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stdout]   |                                                                ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/into_cons.rs:234:21
[INFO] [stdout]     |
[INFO] [stdout] 234 |                       ( $( $N ),* )
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 | / impl_for_tuple! {
[INFO] [stdout] 249 | |    (0, A),
[INFO] [stdout] 250 | |    (1, B),
[INFO] [stdout] 251 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/tuple.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |         (self.head)
[INFO] [stdout]     |         ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -         (self.head)
[INFO] [stdout] 185 +         self.head
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/tuple.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |         (self.head)
[INFO] [stdout]     |         ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -         (self.head)
[INFO] [stdout] 185 +         self.head
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `cons::Cons<V, cons::Nil>: FixHead` is not satisfied
[INFO] [stdout]    --> src/into_cons.rs:148:32
[INFO] [stdout]     |
[INFO] [stdout] 148 |     default type Specialized = DefaultIntoCons<Self>;
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^ the trait `FixHead` is not implemented for `cons::Cons<V, cons::Nil>`, which is required by `DefaultIntoCons<V>: SpecializedIntoCons`
[INFO] [stdout]     |
[INFO] [stdout] note: required for `DefaultIntoCons<V>` to implement `SpecializedIntoCons`
[INFO] [stdout]    --> src/into_cons.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 | impl<V> SpecializedIntoCons for DefaultIntoCons<V>
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 173 | where
[INFO] [stdout] 174 |     Cons<V, Nil>: FixHead,
[INFO] [stdout]     |                   ------- unsatisfied trait bound introduced here
[INFO] [stdout] note: required by a bound in `IntoConsSpecializer::Specialized`
[INFO] [stdout]    --> src/into_cons.rs:81:36
[INFO] [stdout]     |
[INFO] [stdout] 81  |     type Specialized: From<Self> + SpecializedIntoCons;
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^ required by this bound in `IntoConsSpecializer::Specialized`
[INFO] [stdout] help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
[INFO] [stdout]     |
[INFO] [stdout] 147 | impl<V> IntoConsSpecializer for V where cons::Cons<V, cons::Nil>: FixHead {
[INFO] [stdout]     |                                   +++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 22 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flatten` (lib) due to 23 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the trait bound `cons::Cons<V, cons::Nil>: FixHead` is not satisfied
[INFO] [stdout]    --> src/into_cons.rs:148:32
[INFO] [stdout]     |
[INFO] [stdout] 148 |     default type Specialized = DefaultIntoCons<Self>;
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^ the trait `FixHead` is not implemented for `cons::Cons<V, cons::Nil>`, which is required by `DefaultIntoCons<V>: SpecializedIntoCons`
[INFO] [stdout]     |
[INFO] [stdout] note: required for `DefaultIntoCons<V>` to implement `SpecializedIntoCons`
[INFO] [stdout]    --> src/into_cons.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 | impl<V> SpecializedIntoCons for DefaultIntoCons<V>
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 173 | where
[INFO] [stdout] 174 |     Cons<V, Nil>: FixHead,
[INFO] [stdout]     |                   ------- unsatisfied trait bound introduced here
[INFO] [stdout] note: required by a bound in `IntoConsSpecializer::Specialized`
[INFO] [stdout]    --> src/into_cons.rs:81:36
[INFO] [stdout]     |
[INFO] [stdout] 81  |     type Specialized: From<Self> + SpecializedIntoCons;
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^ required by this bound in `IntoConsSpecializer::Specialized`
[INFO] [stdout] help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
[INFO] [stdout]     |
[INFO] [stdout] 147 | impl<V> IntoConsSpecializer for V where cons::Cons<V, cons::Nil>: FixHead {
[INFO] [stdout]     |                                   +++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out`
[INFO] [stdout]    --> src/into_cons.rs:413:9
[INFO] [stdout]     |
[INFO] [stdout] 413 | /         assert_eq!(
[INFO] [stdout] 414 | |             left.into_cons(),
[INFO] [stdout] 415 | |             Cons {
[INFO] [stdout] 416 | |                 head: Left(1),
[INFO] [stdout] 417 | |                 tail: Nil,
[INFO] [stdout] 418 | |             }
[INFO] [stdout] 419 | |         );
[INFO] [stdout]     | |         ^
[INFO] [stdout]     | |         |
[INFO] [stdout]     | |_________<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out
[INFO] [stdout]     |           cons::Cons<either::Either<{integer}, _>, cons::Nil>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out` doesn't implement `Debug`
[INFO] [stdout]    --> src/into_cons.rs:413:9
[INFO] [stdout]     |
[INFO] [stdout] 413 | /         assert_eq!(
[INFO] [stdout] 414 | |             left.into_cons(),
[INFO] [stdout] 415 | |             Cons {
[INFO] [stdout] 416 | |                 head: Left(1),
[INFO] [stdout] 417 | |                 tail: Nil,
[INFO] [stdout] 418 | |             }
[INFO] [stdout] 419 | |         );
[INFO] [stdout]     | |_________^ `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out`
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out`
[INFO] [stdout]    --> src/into_cons.rs:420:9
[INFO] [stdout]     |
[INFO] [stdout] 420 | /         assert_eq!(
[INFO] [stdout] 421 | |             right.into_cons(),
[INFO] [stdout] 422 | |             Cons {
[INFO] [stdout] 423 | |                 head: Right(2),
[INFO] [stdout] 424 | |                 tail: Nil,
[INFO] [stdout] 425 | |             }
[INFO] [stdout] 426 | |         );
[INFO] [stdout]     | |         ^
[INFO] [stdout]     | |         |
[INFO] [stdout]     | |_________<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out
[INFO] [stdout]     |           cons::Cons<either::Either<_, {integer}>, cons::Nil>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out` doesn't implement `Debug`
[INFO] [stdout]    --> src/into_cons.rs:420:9
[INFO] [stdout]     |
[INFO] [stdout] 420 | /         assert_eq!(
[INFO] [stdout] 421 | |             right.into_cons(),
[INFO] [stdout] 422 | |             Cons {
[INFO] [stdout] 423 | |                 head: Right(2),
[INFO] [stdout] 424 | |                 tail: Nil,
[INFO] [stdout] 425 | |             }
[INFO] [stdout] 426 | |         );
[INFO] [stdout]     | |_________^ `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `<<either::Either<usize, usize> as IntoConsSpecializer>::Specialized as SpecializedIntoCons>::Out`
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 26 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0369, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flatten` (lib test) due to 27 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7c58b4944ae0fc2c3ffe9dc71ff2670a7c355ed3353070281cfb5d39b219fbbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c58b4944ae0fc2c3ffe9dc71ff2670a7c355ed3353070281cfb5d39b219fbbd", kill_on_drop: false }`
[INFO] [stdout] 7c58b4944ae0fc2c3ffe9dc71ff2670a7c355ed3353070281cfb5d39b219fbbd